Ruger's web site has sn data.
1975
Ruger's website has a sn fucntion that allows you to find out when a firearm was made.
We can't tell without the serial number- but if you go to the Ruger website, under Customer Service, you can see the year of manufacture for serial numbers. You will need the spefic model of your rifle.
Ruger website, under customer service, historical data, lists year of manufacture by serial number for different Ruger models.
61-85
If you mean a Ruger Model 96, $300-$400, depending on condition, box, papers, etc.
with a decent scope and strap, from 600 to 700 if condition is good. 400 to 500 for rifle only.
Ruger's web site has extensive sn data.
It is worth anywhere from 500-850 depending on condition.
Ruger has extensive sn on their web site. Value will depend on the condition, accessories, box, papers, etc..
For a short time, Ruger manufactured a version of the 10/22 rifle in .22 magnum and distributed them in America through the Wal-mart store chain.